Direct and indirect influences of long-term fertilization on microbial carbon and nitrogen cycles in an alpine grassland
文献类型：期刊论文
| 作者 | Chen, Wenjing3; Zhou, Huakun1,4; Wu, Yang3; Wang, Jie3 ; Zhao, Ziwen2,5; Li, Yuanze3; Qiao, Leilei3; Chen, Kelu2,4; Liu, Guobin3,5; Xue, Sha1,3,5
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| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
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| 出版日期 | 2020-10-01 |
| 卷号 | 149页码:13 |
| ISSN号 | 0038-0717 |
| 关键词 | C and N cycling Microbial community N fertilization Qinghai-tibet plateau Stoichiometric homeostasis |
| DOI | 10.1016/j.soilbio.2020.107922 |
| 通讯作者 | Xue, Sha(xuesha100@163.com) |
| 英文摘要 | Beginning in the twentieth century, atmospheric deposition of N and P greatly increased in terrestrial ecosystems, including alpine grasslands. These inputs have profoundly affected soil microbial C and N cycles. Changes in the microbial environment are directly caused by changes in soil N and P availability and also indirectly through changes in vegetation in response to increased fertilization. The mechanisms involved in both the direct and indirect changes are not mutually exclusive and are poorly understood. Therefore, we investigated the responses of vegetation and soil microbes to a 9-year fertilization (N and P) experiment in an alpine grassland in the Qinghai-Tibetan Plateau in China. We found that N addition altered soil microbial community composition and processes regardless of P addition. To maintain stoichiometric homeostasis, soil microbes adjusted metabolic processes in response to changes in nutrient availability. High N availability enhanced microbial investment in C acquisition as indicated by beta-1,4-Glucosidase activity. The abundance of microbial taxa that degrade labile C also increased. High N inputs also induced a proliferation of denitrifiers and increased the gaseous N loss potential. Partial least squares path modelling indicated that soil parameters (e.g., soil organic C and total N) and changes in the plant community played a key role in shaping soil microbial community structure and C and N cycling. Our results suggest that vegetation and stoichiometric differences between resource availability and soil microbial nutrient requirements collectively regulate the responses of soil microbial processes to N enrichment, which provides novel experimental insights into the mechanisms underlying the effects of nutrient inputs on microbial C and N cycles. Ultimately, our findings highlight the importance of plant traits in regulating microbial nutrient cycles, further promoting our comprehension about the mechanism of variation in the microbial nutrient cycles in an alpine grassland soils. |
| WOS关键词 | SOIL BACTERIAL COMMUNITIES ; PLANT FUNCTIONAL TRAITS ; STOICHIOMETRIC CONTROLS ; PHOSPHORUS ADDITION ; ENZYME-ACTIVITY ; DIFFERENTIAL RESPONSES ; ECOSYSTEM RESPIRATION ; FUNGAL COMMUNITY ; SPECIES IDENTITY ; DIVERSITY |
| 资助项目 | National Science Foundation of China[31672475] ; National Science Foundation of China[41771557] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0302] ; Qinghai Provincial Key Laboratory of Restoration Ecology in Cold Regions, Northwest Institute of Plateau Biology[2020-KF-04] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000567094800009 |
| 资助机构 | National Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Qinghai Provincial Key Laboratory of Restoration Ecology in Cold Regions, Northwest Institute of Plateau Biology |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/156839]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Xue, Sha |
| 作者单位 | 1.Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining 810000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 4.Chinese Acad Sci, Northwest Inst Plateau Biol, Qinghai Prov Key Lab Restorat Ecol Cold Reg, Xining 810000, Peoples R China 5.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Wenjing,Zhou, Huakun,Wu, Yang,et al. Direct and indirect influences of long-term fertilization on microbial carbon and nitrogen cycles in an alpine grassland[J]. SOIL BIOLOGY & BIOCHEMISTRY,2020,149:13. |
| APA | Chen, Wenjing.,Zhou, Huakun.,Wu, Yang.,Wang, Jie.,Zhao, Ziwen.,...&Xue, Sha.(2020).Direct and indirect influences of long-term fertilization on microbial carbon and nitrogen cycles in an alpine grassland.SOIL BIOLOGY & BIOCHEMISTRY,149,13. |
| MLA | Chen, Wenjing,et al."Direct and indirect influences of long-term fertilization on microbial carbon and nitrogen cycles in an alpine grassland".SOIL BIOLOGY & BIOCHEMISTRY 149(2020):13. |
入库方式： OAI收割
来源：地理科学与资源研究所
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